I had a mate do some work on my PC and he re-installed XP Pro for me. Then he applied a Service Pack and now there is this message on the desktop in the bottom right hand corner:

For testing purposes only. Build 2600.xpsp1.020828-1920 (Service Pack 1)



I got hold of another version of the Service Pack 1 from another source and the message remains. Any assistance would be much apreciated. I really just want to get rid of the message if possible.